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Basic Rules for Lapping length in Column l Reinforcement Lapping Zone in Column
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Lap Length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended.
Lap Length is also required when the bar diameter has to be changed along the length (as is sometimes done in columns).Branding
The purpose of ‘Lap’ is to transfer the axial force effectively from the terminating bar into the connecting bar with this same line of action in the junction.
This invariably introduces stress concentrations at this surrounding concrete. These effects should be minimized by
Using proper splicing techniques.
Keeping these lapping locations away from sections with high flexural/shear stresses. and
Staggering the locations of splicing at the individual bars of a group (as typically in a column).
When splicing in such situations becomes unavoidable, special precautions need to be employed, such as
Increasing the length of the lap (In lap splices and lap welding)
Using spirals or closely-spaced stirrups around the length of the stirrups.
Lap Length As Per IS 456
Generally, development length is 41d where d is the diameter of the bar. For direct tension, the lap length should be 2 Ld or 30d whichever is greater is considered. In this case, the straight length of the lapping bar shall not be less than 15d or 20cm.
Type of Lapping Method:
Lapping of bars (lap splice)
Welding of bars (welded splice)
Mechanical connection
Timestamp:
00:11 Where we should do Lapping in Column
05:08 Understanding Drawing Chart
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#ReinforcementLappingZoneinColumn #LaplengthinRCCColumn #LaplengthinRCCColumn #ReinforcementLappingzoneforColumn #LappingZoneandLappingLengthinColumns
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Lap Length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended.
Lap Length is also required when the bar diameter has to be changed along the length (as is sometimes done in columns).Branding
The purpose of ‘Lap’ is to transfer the axial force effectively from the terminating bar into the connecting bar with this same line of action in the junction.
This invariably introduces stress concentrations at this surrounding concrete. These effects should be minimized by
Using proper splicing techniques.
Keeping these lapping locations away from sections with high flexural/shear stresses. and
Staggering the locations of splicing at the individual bars of a group (as typically in a column).
When splicing in such situations becomes unavoidable, special precautions need to be employed, such as
Increasing the length of the lap (In lap splices and lap welding)
Using spirals or closely-spaced stirrups around the length of the stirrups.
Lap Length As Per IS 456
Generally, development length is 41d where d is the diameter of the bar. For direct tension, the lap length should be 2 Ld or 30d whichever is greater is considered. In this case, the straight length of the lapping bar shall not be less than 15d or 20cm.
Type of Lapping Method:
Lapping of bars (lap splice)
Welding of bars (welded splice)
Mechanical connection
Timestamp:
00:11 Where we should do Lapping in Column
05:08 Understanding Drawing Chart
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Each Course at 400 RS only !! Whats App on 9953779047 for More Details & Combo Offers
Course Completion certificates & internship Certificate will be provided !!
Course Links from Udemy - Click Below
Course 1 - Site Engineering Course - Construction methodology (40 hours Content)*
🎯 Course 2 -Quantity Surveying Building Estimation BBS with Excel & CAD (21 hours content)
🎯Course 3 - Learn to Read Construction & Structural Drawing like Expert (27 hours content)
🎯 Course 4 – 45 Days Internship on Practical Aspects of Building Construction (45 hours content)
🎯 *Course 5 - Diploma in Basics of Civil Engineering for Construction (20 hours content)
🎯 Course 6 - Construction Project Planning & Project scheduling -MS Excel (6 hours content)*
🎯 *Course 7 - ETABS- Learn Building modelling Analysis & Detailing (20 hours content)
🎯 *Course 8- Concrete Technology - A practical Approach (14hours content)
Course 9 - Master Civil Engineering Knowledge in Building Construction
#CIVILBRAINS #siteengineercourse #Basiccivilknowledge #RulesforLappinglengthinColumn
#ReinforcementLappingZoneinColumn #LaplengthinRCCColumn #LaplengthinRCCColumn #ReinforcementLappingzoneforColumn #LappingZoneandLappingLengthinColumns
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